Nut or pipe wrench.



1i. STEWART.

NUT 0R PIPE WRENCH.

APPLICATION FILED OUT. 8, 1907.

904,81 6. Patented Nov. 24, 1908.

7 INVENTOI? David Ste wart 8) -%Zz$;% y w. MW

UNITED STATES PATENT OFFICE.

DAVID STEWART, OF SOHENEUTADY, NEW YORK, ASSIGNOR TO STEWART WRENCH 8:MFG. 00., OF ALBANY, NEW YORK, A CORPORATION OF NEW YORK.

NUT OR PIPE WRENCH.

Application filed October 8, 1907.

To all whom it may concern:

Be it known that 1, DAVID STEWART, a citizen of the United Kingdom ofGreat Britain and Ireland, residing at Schenectady, county ofSchenectady, State of New York, have invented a certain new and usefulImprovement in Nut or Pipe WVrenches, of which the following is aspecification, such as will enable others skilled in the art to which itappertains to make and use the same.

The object of my invention is to provide a nut or pipe-wrench of therocking-jawtype, of a simple and cheap form of construction, of greatvariability of jaw-width, in which the pivot joint of the rocking orpivot-jaw, while of great simplicity and strength, will also permit ofeasy disassembling of the parts; and in which the jaws of the wrench maybe easily and quickly locked firmly upon the nut or pipe to be turned bythe wrench, and which, while provided with a wooden or non-metallic griphandle, will have such wooden handle fully protected against injury.

To such ends my invention consists in substance, of a rectangular slidebar provided at one end with a jaw head and at the other with a tang, aslide-piece or sleeve sliding on the slide-bar, a jaw-piece having ahead similar to the jaw-head of the slidebar and coacting therewith andpivoted to the slide piece or sleeve by a non-pivot-pin dovetailrock-joint, abutting shoulders on the heels of the sliding-sleeve and onthe j aw-head piece for preventing extreme backward movement thereof, aspring normally forcing the jaw-piece toward the slide-bar, a combinedsecuring and set-screw provided with a thumb-nut working in a femalethread in the heel of the sliding-sleeve, passing through the heel in asecuring cavity in the heel of the pivot jawpiece, a metallic handleboss having two resilient side wingpieces, crescent shaped in crosssection through which the tang of the slide-bar passes, and also twoupper rearwardly extending wings or prongs, a passage through theslide-piece or sleeve provided with a female screw thread locatedbetween the slide-bar and the pivot jawpiece, an adjusting screw workingin this screw threaded passage, and having a thumb-nut abutting againstthe rearward faces of the wings or prongs of the handle boss, anon-metallic Specification of Letters Patent.

Patented Nov. 24, 1908.

Serial No. 396,405.

grip-piece interposed between the tang of the slide bar and theresilient wing pieces of the handle boss, a metallic securing thimbleforcing the ends of the wing pieces toward one another upon thegrip-piece, and a securing pin passing through the thimble and the endof the slide-bar tang; although it is not to be understood that theinvention is necessarily limited to a device comprising at once all ofthe elements before enumerated, as the same consists in the particularcon struction of certain devices and parts, and the particularconstruction, combination and arrangement of certain devices and parts,all as hereinafter more particularly set forth in the specification, andpointed out in the claims.

My said invention is fully set forth in the following specification, ofwhich the accompanying drawings form a part, wherein similar numerals ofreference designate like or equivalent parts wherever found throughoutthe several views, and in which Figure 1 is a side view of my improvedwrench, partly in section; Fig. 2 is a front view of the handle portionthereof; Fig. 8 is a view of the handle portion in section on the lineaa of Figs. 1 and 2; Fig. & is an end view of the wrench taken on theline bb of Fig. 1 and Fig. 5 is a view in detail of the woodengrip-piece of the handle portion.

Referring to the drawings :'1he reference numeral 1 designates theslide-bar, having at one end the j aw-head 2,usually formed integraltherewith, and at the other a tang 3 preferably of cylindrical form,between which and the rectangular slide portion 1 is a smallerrectangular boss-tang l fitting into a like shaped cavity in themetallic handleboss 5, from which extend the resilient side wing-pieces6 of crescent shape in cross section, and which are each provided at theextreme end with an upwardly turned securing flange 7, at the end of achamfer 10 which flanges fit into a chamfer 8, on the end of the woodenor other non-metallic grip piece 9, held in position between the wingpieces 6.

The grip-piece 9 is usually of the form shown, viz: that of twotruncated cones joined base to base, so as to have the bellying centralportion at aa, when the same is in position, extend beyond thewing-pieces 6, so that the hand may securely grip the same. Thegrippiece is also provided with a central cylindrical bore, throughwhich passes so as to fit tightly therein the cylindrical tang 3 of theslide bar 1, on the lower end of which tang is rigidly secured by a pin11 a metallic thimble 12, fitting over the chamfer 10 of the wing-pieces6 so as to force the flanges 7 into the chamfer 8 of the grip-piece 9.

Extending from the handle boss 5 above one of the wing pieces 6 are twothumbnut wings or prongs 13 between which is the adjusting screw cavity1% in which rotates the adjusting screw 15, having the milled thumbheador nut 16, fitting into and rotating freely in the thumb-nut cavity 17formed in the handle-boss 5 just below the thumb nut wings or prongs 13.

Sliding on the rectangular slide portion 1 of the slidebar 1, is theslide-piece or sleeve 18, usually of the form shown, which is providedwith a screw threaded cavity 19, through which passes and in which worksthe threaded portion of the adjusting screw 15.

In the rear heel or abutting shoulder portion 20 of the sleeve 18, whichis usually of the shape shown and provided with a slanting abuttingsurface 21, is a screw threaded cavity 22 in which works a combinedsecuring and set-screw 23, having the milled thumb-nut or head 24, andthe unthrea-ded securing and setting end portion 25 of which extendsinto a securing cavity 26 formed in the heel of the pivot jaw-piece 27provided with a j aw-head 27, which j aw-piece is pivoted to theslidepiece or sleeve 18 by arounded dovetail pivot lug 28, formedintegral therewith and vibrating freely but snugly in like shapeddovetail cavity 28 formed in the rear of the slide-piece or sleeve 18.

The cavity 26 is of less diameter on a line parallel with the axis ofthe dovetail. pivot lug, than it is upon a line at right angles thereto,as clearly shown in Fig. 1, and the securing screw 23 is provided at theupper end of the threaded portion with a shoulder 34, on which rests acoil-spring 30, which is of the same diameter as the cavity in itssmallest diameter, and this spring is always kept under tension so as tonormally force the pivot jaw-piece forward toward the slide-bar, thusclosing the jaws; and by this arrangement while the pivot jaw-piece willbe free to rock back and forth upon the pivot joint formed by thedovetail, the same cannot move sidewise out of the sliding-piece or.sleeve until the securing screw is removed, and it will also be seenthat when such securing screw is screwed fully into the cavity, the endthereof will force the pivot jawpiece forward and thus lock the jawsfirmly upon the nut or pipe.

While in many cases and for many reasons the spring 30 is desirable, itmay be omitted, in which case the end of the securing pin is of coursemade to fit snugly in the smaller diameter of the cavity 26.

By withdrawing the securing screw 23, the pivot jaw-piece may be removedfrom the slide-piece or sleeve 18 by slipping the clovetail pivot lug 28sidewise out of the cavity 28, then by driving out the pin 11, thethimble 12 may be removed, and a sharp blow or two upon the end of thetang 8 will disengage the slide-bar from the handletwo pieces, and inthe latter case the joining line is of course covered by the wing pieces6.

that I claim is:

1. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar and a pivot jaw-piece pivoted to theslide-piece or sleeve by a rounded dovetail lug formed integral withsuch pivot jaw-piece, a rearwardly extending heel on the slide-piece orsleeve abutting against the heel of the pivot j aw-piece when the sameis rocked rearward, and a combined securing and thumb nut set screwworking in a threaded cavity through the heel of the slide-piece orsleeve, the end of which lies in a. cavity of greater diameter fromfront to rear than from side to side formed in the heel of the pivotjaw-piece.

2. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar, and a pivot jaw-piece pivotedv tothe slide-piece or sleeve by a rounded dovetail lug formed integral withsuch pivot j aw-piece, and a spring normally forcing the pivot aw-piecetowards the slide-bar.

3. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar, and a pivot jaw-piece pivoted to theslide-piece or sleeve by a rounded dovetail lug formed integral withsuch pivot jaw-piece, a rearwardly extending heel on the slide-piece orsleeve abutting against the heel of the pivot jaw-piece when the same isrocked rearward, and a combined securing and thumb-nut set-screw workingin a threaded cavity through the heel of the slide-piece or sleeve, theend of which lies in a cavity of greater diameter fromv front to rearthan fromv side to side formed in the heel of the pivot jaw-piece, and aspring normally forcing the pivot-jaw-piece towards the slide bar.

4t. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar, an adjusting screw working in athreaded cavity through the slide-piece or sleeve between the slide-barand pivot jaw-piece, a pivot jaw-piece pivoted to the slide-piece orsleeve by a rounded dovetail lug formed integral with the pivot awpiece,a rearwardly extending heel on the slidepiece or sleeve abutting againstthe heel of the pivot jaw-piece when the same is rocked rearward, and acombined securing and thumb-nut setscrew working in a threaded cavitythrough the heel of the slidepiece or sleeve, the end of which set-screwlies in a cavity of greater diameter from front to rear than from sideto side formed in the heel of the pivot jaw-piece.

5. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar, an adjusting screw working in athreaded cavity through the slide-piece or sleeve between the slide-barand pivot jaw-piece, and a pivot jaw-piece pivoted to the slide-piece orsleeve by a rounded dovetail lug formed integral with the pivotjawpiece, and a spring normally forcing the pivot jaw-piece toward theslide-bar.

6. In a device of the class described, a metallic handle-boss havingside wing-pieces or tangs of substantially crescent shape incross-section, a substantially cylindrical hollow bored non-metallicgrip-piece inclosed by the side wing-pieces or tangs, a tool tangpassing through the grip-piece, and a metallic thimble secured upon theend of the tang so as to cover the ends of the sidewings or tangs of thehandle-boss and of the grippiece.

7. In a device of the class described, a metallic handle-boss havingside wing-pieces or tangs of substantially crescent shape incross-section, a substantially cylindrical hollow bored non-metallicgrip-piece smaller at the ends than at the center, inclosed by the sidewing-pieces or tangs, a tool tang passing through the grip-piece, and ametallic thimble secured upon the end of the tang so as to cover theends of the side-wings or tangs and of the grip-piece.

8. In a wrench, a thumb-nut adjusting screw, a handle-piece comprising ametallic boss having at one side of the upper end a thumbnut recess thetop prong of which is slotted to receive the adjusting screw, sidewing-pieces or tangs of substantially crescent shape in cross-sectionextending from the handle-boss, a chamfer and an inwardly extendingsecuring flange on the end of each side wing-piece or tang, a hollowbored substantially cylindrical shaped non-metallic grip-piece smallerat the ends than at the middle, chamfered at the end to receive the endflanges of the side wing-pieces or tangs located between such sidewing-pieces or tangs, a slide-bar the tang of which passes through thebore of the grip-piece, and a metallic thiinble covering the ends of theside wing-pieces and grip-piece secured to the tang.

9. In a wrench, a thumb-nut adjustingscrew, a handle-piece comprising ametallic boss having at one side of the end a thumbnut recess the topprong of which is slotted to receive the adjusting screw, side wingpieces or tangs of substantially crescent shape in cross-sectionextending from the handle-boss, a hollow bored substantially cylindricalshaped non-metallic grip-piece smaller at the ends than at the middle,located between such side wing-pieces, a slidebar the tang of whichpasses through the bore of the grip-piece, and a metallic thinlblecovering the ends of the side wing-pieces or tangs and grip-piecesecured to the tang.

10. in a wrench, a thumb-nut adjusting screw, a handle-piece comprisinga metallic boss having at one side of the upper end a thumb-nut recessthe top prong of which is slotted to receive the adjusting screw, sidewing-pieces or tangs of substantially crescent shape in cross-sectionextending from the handle-boss, a chamfer and an inwardly eX- tendingsecuring-flange on the end of each side wing-piece or tang, a hollowbored substantially cylindrical shaped non-metallic grip-piece smallerat the ends than at the middle chamfered at the end to receive the endflanges of the side wing-pieces or tangs located between such side-wingpieces, a slide-bar the tang of which passes through the bore of thegrip-piece, a metallic thimble covering the ends of the side wing-piecesor tangs, and grip-piece secured to the tang, a jaw-head on theslide-bar, a slide-piece or sleeve sliding on the slide-bar, and a pivotjaw-piece pivoted to the slide-piece or sleeve by a rounded dovetail lugformed integral with the pivot jaw-piece.

11. In a wrench, a thumb-nut adjusting screw, a handle-piece comprisinga metallic boss having at one side of the upper end a thumb-nut recessthe top prong of which is slotted to receive the adjusting screw, sidewing-pieces or tangs of substantially crescent shape in cross-sectionextending from the handle-boss, a hollow bored substantially cylindricalshaped non-metallic grip-piece smaller at the ends than at the middlelocated between such side wing-pieces or tangs, a slide bar the tang ofwhich passes through the bore of the grip piece, a metallic thimblecovering the ends of the side wing pieces or tangs and grip-piecesecured to the tang, a jaw-head on the slide-bar, a slide-piece orsleeve sliding on the slide-bar, and a pivot jawpiece pivoted to theslide-piece or sleeve by a rounded dovetail lug formed integral with thepivot j aw-piece.

12. In a wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceor sleeve sliding on the slide-bar, and a pivot jaw-piece pivoted to theslide-piece or sleeve by a the slide-piece 0r sleeve by a roundeddovelOUllClGCl dove-tail lug formed integral with such pivot jaw-piece,and means for securing the, pivot jaw-piece against side movement in theslide-piece or sleeve.

13. In a Wrench, a slide-bar, a jaw-head on the slide-bar, a slide-pieceo1 sleeve sliding on the slide-bar, an adjusting screw Working in athreaded cavity through the slidepiece 01" sleeve between the slide-barand pivot jaw-piece, a pivot j aW-piece pivoted to tail lug formedintegral With such pivot jawpiece, and means for securing the pivotjawpiece against side movement in the slidepiece or sleeve.

Signed this 7th day of Sept. 1907.

DAVID STEWART.

Witnesses JOHN McKILLoP, lVILLIAM GETTY.

